With Walk Wing, the retractable wheels you can slip onto you shoes, you can walk and ride as though there are wings on your feet. Wearing just about any shoes (stilettos not encouraged), you slip on the casing, strap yourself in, and lower the wheels with a flick of a switch. When you encounter an area not ideal for wheels, you can quickly change back to walking with the same switch. The retractable wheels will be raised, leaving you to walk with your flat shoes. The four rubber wheels are strong enough to handle daily use but the units are light enough to not disrupt your walking. Walk Wing keeps your shoes close to the ground for a steadier and more enjoyable ride while the adjustable straps add comfort and stability. The Walk Wing comes in white and black and your choice of four sizes.